For Hongkongers interested in learning about China's rich history, there are usually two choices - via textbooks or nauseating, mainland-funded propaganda films. But according to Jeffrey Schneider, director of InterAsia Auctions, there's another way - collecting Chinese stamps. He is handling the auction of more than 3,500 Chinese stamps, some dating as far back as 1878, today at the Park Lane hotel in Causeway Bay. 'This collection basically sums up the political and social history of the People's Republic,' Schneider said at a media preview on Wednesday. Highlights include four 1968 unissued 'Great Victory of the Cultural Revolution' stamps showing Chairman Mao Zedong with military leader Lin Biao - estimated to be worth HK$7.5 million to HK$9 million - and a 1941 stamp depicting revolutionary Sun Yat-sen. Schneider said HK$70 million was expected. 'Hong Kong is the centre of auctioning Asian stamps because it's a metropolitan city with Chinese heritage.'